ASUS Sabertooth x79 machine CPU led

Hi I recently rebuilt a old machine and brought a new asus sabertooth motherboard for it but when I try to boot the cpu LED just stays on and there is no display before this it was the memory led but now it's the CPU led I've tried reseating the heatsink already.

I'm thinking it's the memory regardless of the CPU led being on because before the memory LED was lighting up but it would be a waste of money if it wasn’t the RAM and I went out and brought some I've got 4 2 gig generic sticks and 2 gskill 1 gig sticks.